<div class="input-group" tooltip="{{field.nickname}}">
    <input type="text" class="form-control border-right-0" title=""
           [value]="field.leftNumber.value"
           (keyup)="field.leftNumber.keyUp($event)">
    <div class="input-group-prepend w-25 border-left-0">
    <span class="input-group-text w-100 border-left-0 bg-white text-secondary overflow-hidden">
      <span>{{field.nickname}}</span>
    </span>
    </div>
    <input type="text" class="form-control border-left-0" title=""
           [value]="field.rightNumber.value"
           (keyup)="field.rightNumber.keyUp($event)">
</div>